Infrared light irradiating lamp for vehicle

Abstract

An infrared light irradiating lamp for a vehicle includes a projection lens disposed on an optical axis extending in a longitudinal direction of the vehicle; a light source bulb disposed behind the projection lens, the light source bulb including a filament for emitting light; a reflector for reflecting light emitted from the light source bulb in a forward direction; and an infrared light transmitting film provided between the reflector and the projection lens. The light source bulb is disposed such that a longitudinal direction of the filament is substantially orthogonal to the optical axis.

Description

technical field [0001] The present invention relates to an infrared irradiation lamp for vehicles capable of irradiating light from a light source bulb having a filament as infrared light by using a reflector, an infrared light transmission film, and a projection lens. Background technique [0002] There are the following infrared light irradiation lamps for vehicles. By sharing them with a CCD camera mounted on a car, which uses infrared light to illuminate the front of the vehicle and has a sensitivity close to near-infrared light, the captured image can be processed and obstacles can be confirmed (such as , refer to Patent Document 1). [0003] As shown in FIG. 8 , this vehicle infrared irradiation lamp 1 is constituted as follows. A light source bulb 9 as a visible light source and a substantially ellipsoidal reflector are disposed in a lamp chamber 7 partitioned by a lamp body 3 and a front lens 5 . mirror 11, and an infrared light pass filter 13 is arranged between th...

AI Technical Summary

Problems solved by technology

[0007] However, in the conventional infrared irradiation lamp 1 for vehicles, as described above, the light source bulb 9 is installed in a rearwardly inserted structure. Therefore, as shown in FIG. 15a, 15b, 15c, 15d and produce radially

The light spots 15a, 15b, 15c, 15d are easily misrecognized as the white line 17 on the road surface. The problem of false detection

[0008] In addition, in the structure where the light source bulb is inserted from the rear, there is a problem that the protrusion from the rear of the lamp unit increases, and the overall length of the lamp unit becomes longer.

In addition, in the structure in which the light source bulb is inserted from the rear, it is difficult to form a wide hot spot in the lateral direction, and there is a disadvantage that infrared light irradiation, which is beneficial for white line detection, cannot be emitted.

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